Piston



E. E. HAUER.

PISTON; 3 APPLICATION mid APR 15,1920.

1,377,346. Patented M y 10, 1921'.

UNITED STATES PATENT OFFICE.

ELMER n BAUER, or srnmcrrrmn, 01110,

rrsroiv.

Specification of Letters Patent.

PatentedlMay 10, 1921.

Application filed April 1920. Serial No. 3745182.

To all whom it may conoem:

Be it known that I, ELMER E. HAUER, a citizen of the United States,residing at Springfield, in the county of Clark and 'State of Ohio, haveinvented certain new and useful Improvements in Pistons, of

- which the following is a specification, reference being had therein tothe accompanying drawings.

My invention relates to pistons andthe object of my invention is toprovide improved means for assembling and securing the. packing orpiston rings therefor in 0perative position without removing the body ofthe piston from the cylinder in which it is employed.

This I accomplish by simple and eflicient means having a locking deviceinsuring its safety and thereby save the time, trouble and expense ofdetaching and removing the bodyof the piston from the cylinder.

My'invention consists of the constructions and combinations hereinaftermore fully described and set forth in theclaims.

In the accompanying drawings which form a part of this specificationFigure 1 is a longitudinal section of; a piston embodying my inventionand Fig. 2 is a cross'section on the line of 2-2 ofFig, 1.

Referring'to the drawings 1 represents the body of the piston which aswill be seen is in the form of a hollow cylinder having oppositelydisposed inwardly projecting bearings 2 adapted to carry a wrist pm forthe connecting rod, the pin and rod not being shown as they operate in,the usual well known manner. The cylindrical body 1 is provided withreinforcing ribs 3; andv also the ribs 41- to strengthen and carry thebearings 2. j g The cylindrical body 1 operates back and forth withinthe bore of a cylinder in the usual way and as will appear the piston.

or packing rings and their holding members are so constructed andarranged that they can be inserted through the end of the cylinder andsecured to the body of the piston without removing it from the cylinder.i

7 is seated. The head 8 has a central inwardly projecting portion 8 andto reduce the weight of said head itis preferably made "hollow as shownand is provided with webs 10. I I I r The piston rings andtheir holdingmembers being in, place it is essential to lock them in place and forthis purpose I provide an annular recess 11 in the body 1 and insertthrough a perforation in the web 10 of the head 8 and the holding ring 7a pin 12 with its outer end extending intothe recess 11. The pin 12 ispreferably provided with a head 13 sothat it canbe easily inserted andremoved. A hollow plug 14 is screw threaded to the head 8, asshown andsaid plug contacts the head 13 of the pin and thereby locks the holdingring and head 8 from turning; v a

I hten and hold the plug 1 1 against the pin head 13, I preferablyprovide the plug with a beveled edge 15' seating itself against a likebevel of a projection 16 on the head 8 and I split the plug at 17so thatwhen screwed down against the beveled pro jection16 the plug will expandagainst the threaded opening andthe pin12.

I The body 1 is split 'at 18 to adjustitself to the bore of the cylinderin which it is employed.

The cylinder 'head of the cylinder in which the piston is 1 employedbeing removed it willbe readily seen that without removing the bodyofthe pistonthe screw plug 14,

pin 12, head piston ring 9, holding ring :7 4

and piston ring Gican be removed in the order named and reverse order. j

Angular recesses 19 in the. plug 13 and head 8 and pinholes 20 in theholding ring may; be assembled in the screw t e parts in place.

Having thus described my invention I claim: f l

1. In a piston the combination with a rovided for suitable wrenches tobody andapiston ring,-of a device to hold I said ring in operativeposition and means including an expansible member to lock said device inholding position without removing said body from the cylinder in whichit is employed. I 4 I 2. In a piston the. combination with a hollowcylindrical body and a piston ring of a device tohold said ring inoperative position and means including anexpansible member to lock saiddevice in holding position without removing said body from the cylinderin which it is employed. 7

3. In a piston the combination with a hollow cylindrical body and apiston ring of a holding ring for said piston ring, said holding ringbeing screw threaded to the interior wall of said body and meansincluding an expansible member to lock said holding ring in holdingposition without removing said body from the cylinder in which it isemployed.

L'In apiston the combination with a hollow cylindrical body and a pistonring, of a device for holding said ring in operative position and meansincluding an expansible member to lock said device in holding position,said holding device and locking means being removable from the cylinderin which they are employed without removing said body from saidcylinder.

5. In a piston, a body and piston rings and means in combination withsaid body to form a plurality of annular grooves in which said rings areseated and a device including an expansible member to lock said means inassembled position, said groove forming means and locking device beingremovable from the cylinder in which they are employed without removingsaid body from said cylinder; a

6. In a piston, the combination with a body having a wrist pin bearingdisposed transversely to the line of movement of said piston and apiston ring, of a, member to hold said ring in operative position, meansto secure said member in holdingposition and a device to lock saidsecuring means, all of said parts other than the'body being removablefrom the cylinder in which they are employed without removing said body.

' 7. In a piston, the combination with a hollow cylindrical body and apiston ring, of a holding ring for said piston ring, said holding ringbeing screw threaded to the interior wall of said body, means to securesaid holding ringin holding position and a device to lock said securingmeans, said holding ring, securing means and lockin device beingremovable from the cylinder in which they are employed without remov- 7ing said body.

8. In a piston, a body and piston rings and means in combination withsaid body to form a plurality of grooves in which said rings are seated,said means including members to hold said means in operative position,means to secure said holding members in holding position and a device tolock said securing means.

9. In a piston, a hollow cylindrical body and piston rings and holdingmembers in combination with said body forming a plurality of grooves inwhich said rings are seated, the interior Wall of said body having arecess, a pin projecting through perforations in saidholding membersinto said recess to secure said members in holding position and means tolock said pin.

10. In a piston, a hollow cylindrical body I and piston rings andholding members in combination with said body forming a plurality ofgrooves in which said rings are seated, one of said holding membersforming the piston head and the inner wall of saidbody having an annularrecess, a pin projecting through perforations in said holding members,into said recess to secure said members in holding position and a screwplug secured to said head to lock said 1n. P 11. In a piston, a hollowcylindrical body and piston rings, the inner Wall of said body having anannular recess, and holding members in combination with said bodyforming a plurality of grooves in which said rings are seated, a pinprojecting through perforations in said holding members into saidrecess, one of said holding members having a beveled projection and ascrew plug secured to said member and having a split end seated on saidbeveled projection and engaging said pin so that when said plug istightened its split end will expand against the head of said pin.

V In testimony whereof I have hereunto afiixedmy signature in thepresence of two witnesses.

ELMER HAUER.

WVitnesses CHASE STEWART, W. A. BARBER.

